CN205173181U

CN205173181U - Bolt

Info

Publication number: CN205173181U
Application number: CN201520837018.7U
Authority: CN
Inventors: 刘恢先; 王育妮; 王珊
Original assignee: China National South Aviation Industry Co Ltd
Current assignee: AECC South Industry Co Ltd
Priority date: 2015-10-26
Filing date: 2015-10-26
Publication date: 2016-04-20
Anticipated expiration: 2025-10-26

Abstract

The utility model provides a bolt, its includes interconnect's screw rod and head, the radial cross section of head is the rectangle, the length of the minor face of head compares the big 3 -8mm of diameter of screw rod, the length on the long limit of head is 1.351 -1.651 with the ratio of the length of minor face. The utility model provides a bolt through setting up rectangular head, will grow the limit and correspond the deformation orientation when the installation, can effectively reduce bolt's the eccentric distance that the head bore, just also effectively reduce bolt's the bending stress that the head bore to bolt's the cracked condition of head emergence root in the use has been avoided.

Description

A kind of bolt

Technical field

The utility model relates to mechanical field, particularly a kind of bolt.

Background technique

Bolt fastening structure is the linkage structure that mechanical field is conventional, but the mechanical connection position of deflection load is born at some, the auxiliary connection part installing joint such as during turbo oar engine assembling, easily in use there is the situation of fracture of root in commercially available standard hex hook bolt, thus has a strong impact on the use of product.Fig. 1 is a kind of auxiliary bolt strained schematic diagram installing the connection part of joint of turbo oar engine, shown in Figure 1, bolt 1 connects auxiliary installation joint 3 by nut 2, compressor casing 4 and combustion box 5, due to the effect of deflection load F1, described auxiliary installation joint 3 can deform, thus make described bolt 1 head generation deflection, the head of described like this bolt 1 can bear the excessive flexural stress that described deflection load F1 causes, when described bolt 1 adopts existing commercial standard hexagon head bolt, just be easy under the repeated action of described deflection load F1, cause the head of described bolt 1 from fracture of root.

Model utility content

The technical problems to be solved in the utility model is to provide a kind of bolt, to reduce or to avoid problem noted earlier.

For solving the problems of the technologies described above, the utility model proposes a kind of bolt, it comprises interconnective screw rod and head, the radial cross section of described head is rectangular, the length 3-8mm larger than the diameter of described screw rod of the minor face of described head, the length on long limit of described head and the ratio of the length of minor face are 1.35/1-1.65/1.

Preferably, the length of the minor face of described head 4mm larger than the diameter of described screw rod.

Preferably, the length on long limit of described head and the ratio of the length of minor face are 1.35/1.

Preferably, the corner of described head is provided with the corner cut that angle is 60 degree.

A kind of bolt provided by the utility model, by arranging rectangular head, when mounted by corresponding for long limit deformation direction, the throw of eccentric that the head that can effectively reduce bolt bears, also the flexural stress that the head just effectively reducing bolt bears, thus the situation avoiding the head generation fracture of root of bolt in using process.

Accompanying drawing explanation

The following drawings is only intended to schematically illustrate the utility model and explain, does not limit scope of the present utility model.Wherein,

Fig. 1 is a kind of auxiliary bolt strained schematic diagram installing the connection part of joint of turbo oar engine;

Fig. 2 is the structural representation of a kind of bolt according to a specific embodiment of the present utility model;

Fig. 3 is the left TV structure schematic diagram of Fig. 2.

Embodiment

In order to there be understanding clearly to technical characteristics of the present utility model, object and effect, now contrast accompanying drawing and embodiment of the present utility model is described.Wherein, identical parts adopt identical label.

Fig. 2 is the structural representation of a kind of bolt according to a specific embodiment of the present utility model; Fig. 3 is the left TV structure schematic diagram of Fig. 2.Shown in Fig. 2-3, the utility model provides a kind of bolt 6, it comprises interconnective screw rod 61 and head 62, the radial cross section of described head 62 is rectangular, the length w2 3-8mm larger than the diameter d of described screw rod 61 of the minor face of described head 62, the length w1 on long limit of described head 62 and the ratio of the length w2 of minor face are 1.35/1-1.65/1.

Fig. 1 is a kind of auxiliary bolt strained schematic diagram installing the connection part of joint of turbo oar engine; Shown in Figure 1, when described bolt 6 provided by the utility model be applied in such need the environment bearing described deflection load F1 time, can be that the minor face of described head 62 is in the side of described deflection load F1 when mounted, namely make the corresponding described deflection load F1 direction of the minor face of described head 62, the flexural stress that the described head 62 that so just greatly can reduce described bolt 6 bears, thus avoid described head 62 from fracture of root.The length w2 3-8mm larger than the diameter d of described screw rod 61 of the minor face of described head 62, can ensure that described head 62 effectively can push down described auxiliary installation joint 3 like this, the length w1 on long limit of described head 62 and the ratio of the length w2 of minor face are between 1.35/1 to 1.65/1, can ensure the compacting area of described head 62 to described auxiliary installation joint 3.

The corner of described head 62 can be provided with the corner cut that angle [alpha] is 60 degree, can be convenient to like this clamp described head 62 in the assembly process of described bolt 6, and clamping process also can be avoided to cause damage to described head 62.

In a preferred embodiment, the length w1 on long limit of described head 62 and the ratio of the length w2 of minor face are 1.35/1.

In a preferred embodiment, the length w2 of the minor face of described head 62 4mm larger than the diameter d of described screw rod 61.

Although it will be appreciated by those skilled in the art that the utility model is described according to the mode of multiple embodiment, not each embodiment only comprises an independently technological scheme.So describe in specification be only used to clear for the purpose of; specification should integrally be understood by those skilled in the art, and regards technological scheme involved in each embodiment as the mode that mutually can be combined into different embodiment to understand protection domain of the present utility model.

The foregoing is only the schematic embodiment of the utility model, and be not used to limit scope of the present utility model.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present utility model and principle, amendment and combination, all should belong to the scope of the utility model protection.

Claims

1. a bolt, it comprises interconnective screw rod and head, it is characterized in that, the radial cross section of described head is rectangular, the length 3-8mm larger than the diameter of described screw rod of the minor face of described head, the length on long limit of described head and the ratio of the length of minor face are 1.35/1-1.65/1.

2. bolt according to claim 1, is characterized in that, the length 4mm larger than the diameter of described screw rod of the minor face of described head.

3. bolt according to claim 1, is characterized in that, the length on long limit of described head and the ratio of the length of minor face are 1.35/1.

4. bolt according to claim 1, is characterized in that, the corner of described head is provided with the corner cut that angle is 60 degree.